Ah, you're right, totally forgotten that not every part of the world used my fellow voltage standards

Though about wattmeters, it's my turn to accuse yourself of being region-specific ^^ In France at least (should check in Sweden while I'm here), old-fashioned mechanical watt counters with a spinning thingie (1 turn = X kWh) are still common, and using them for wattage calculation is quite cumbersome and imprecise.